Head-Mounted Speaker Array Pinna Reflections
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Solution Overview
Problem
Current audio systems, including in-room speakers and headphones, fail to accurately simulate point source sounds originating in front of the listener, as they either combine sounds simultaneously at both ears or lack the necessary ear pinna reflections for sound localization.
Innovation Solution
A head-mounted speaker array apparatus (HMSAA) positions speakers forward of the ear pinnae to create distinct sound reflections, allowing the brain to determine the perceived point source of sounds, even if they originate in front of the listener, by using a frame with speaker arrays that can be adjusted and calibrated for optimal sound localization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If in-room speakers are used to output sound, then the system is simple and portable, but the sound cannot be localized to a point source in front of the listener
Solution Approach 1:
The audio system is segmented into multiple independent speaker units arranged in a specific spatial configuration. Each speaker operates independently to create distinct sound paths, enabling the brain to localize the sound source in front of the listener rather than combining sounds simultaneously at both ears.
Solution Approach 2:
The speaker array is positioned in three-dimensional space forward of the listener's ears, utilizing spatial dimensionality to create realistic sound localization. This moves beyond traditional planar or in-ear configurations by establishing depth and directional positioning in 3D space.
2Measurement precision
If over-the-ear headphones are used to output sound, then the sound is delivered directly to the ear, but the ear pinna reflections necessary for sound localization are lost
Solution Approach 1:
The ear pinna acts as an intermediary element between the speaker array and the ear canal. By positioning speakers forward of the pinna, the system utilizes the pinna's natural reflective properties to create realistic sound localization cues, rather than delivering sound directly to the ear canal as traditional headphones do.
3Measurement precision
If speakers are positioned forward of the pinna, then realistic sound localization is achieved, but the device becomes more complex and less portable
Solution Approach 1:
The head-mounted frame serves multiple functions: it positions the speaker array forward of the pinnae, provides structural support, and enables adjustable configuration. This multi-functionality reduces the need for separate positioning mechanisms, making the system more integrated rather than adding unnecessary complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The HMSAA provides a balanced sound experience that combines the benefits of in-room and over-the-ear headphones, enabling realistic sound localization in any direction, including forward, enhancing applications like virtual reality and video conferencing by accurately simulating sound sources.
Implementation Method 1
positions the first speaker array and the second speaker array forward of a first pinna of a first ear of the listener and a second pinna of a second ear of the listener, respectively, so that sounds output by the speaker arrays are received by the pinnae of the ears of the listener
Data Source
AI summary
The described implementations of a head-mounted speaker array apparatus (“HMSAA”) include speaker arrays having one or more speakers that, when the HMSAA is worn on the head of a listener, are positioned forward of the pinna of each ear of the listener. For example, the HMSAA may include a first speaker array that is coupled to a frame that, when worn by a listener, positions the first speaker array forward of a first pinna of a first ear of the listener. A second speaker array may also be coupled to the frame at a position that, when the frame is worn by the listener, the second speaker array is positioned forward of a second pinna of the second ear of the listener.